Furnace.



W. F. WEATHERS.

FURNACE.

APPLICATION TILED JAN. 8,1914. 1,]. 1 9,206, Patented Dec. 1,1914.

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WILLIAM F. WEATHERS, 0F JACKSON, MICHIGAN.

FURNACE.

Application filed January 8, 1914.

To all whom it may concern Be it known that 1, WILLIAM F. WEATH- ERS, a citizen of the United States of America, residing at Jackson, in the county of Jackson and State of Michigan, have invented certain new and useful Improvements in Furnaces, of which the following is a specification, reference being had therein to the accompanying drawings.

As the heat generated .in oil fuel or gas furnaces is very intense, it is desirable to provide means for protecting the operator from the direct heat of the furnace. For this purpose I have devised a unitary furnace structure having a flue and air blast, said air blast deflecting or directing heat into the fine and away from the tool receiving opening of the furnace structure. Furthermore, in oil or gas forging furnaces it is desirable that there be a full combustion of fuel or gas before tools or articles are subjected to heat, and to this end, I have devised a forging furnace embodying a novel combustion chamber which insures a proper degree of heat at the proper point in the furnace for heating tools or articles placed therein.

How I attain the above and other objects will hereinafter appear, and reference will now be had to the drawing, wherein,

Figure 1 is a perspective view of a furnace, partly broken away, partly in section, and without a damper; Fig. 2 is a view of the rear end of the furnace; Fig. 3 is a per spective view of a detached flue wall; Fig. +1 is an elevation of an arch unit; Fig. 5 is a perspective view of a nozzle; Fig. 6 is a detail sectional view of a furnace leg or support; Fig. 7 is a perspective view of a damper especially designed for the flue of the furnace, and Fig. 8 is a longitudinal sectional view of the furnace.

A furnace in accordance with this inventi on comprises a metallic shell. having a base plate 1 provided with vertical flanges 2, said base plate having the forward end thereof provided with a transverse slot 3. The base plate 1 supports vertical end walls 4c and 5 and side walls 6, said walls being held in position by longitudinal spaced tie rods or stay bolts 7, which are arranged at the vertical edges of the end walls 4; and 5 and at the outer sides of the walls 6, as best shown in Fig. 1. The side walls 6, at the forward ends thereof, have vertical extensions 8 and engaging the rear edges of these extensions is Specification of Letters Patent.

Patented Dec. 1, 1914.

Serial No. 810,921.

a convex flue wall 9 which rests upon the upper, edges of the side walls 6 and has its ends connected to the end wall by tie rods or stay bolts 10. The end wall 5 is therefore of a gr alter height than the end wall 4L and the end wall coiiperates with the wall 9 and the extensions 8 in forming a flue shell.

The metallic shell just described is pro vided with a refractory lining of lire brick or other non-fusible material. The base plate 1 has a lining 11 provided with a flue or slot 12 registering with the slot 3 of the base plate, and the vertical. walls supported by said base plate have linings 13, the lining of the end wall t extending above the upper edge thereof in the form of an arch, as at 14;, and the lining of the end wall 5 terminates in an arch construction in the flue shell. The linings of the walls 6, from the fine to the end wall 4L, is of a less height than the walls 6 whereby the upper edges of the lining can support a roof composed of arcuatcd units. Each unit comprises an arch of bricks 1.1 and the bricks are held together by a sectional metallic holder 16, the sections of said holder being clamped together by bolts 17 and nuts 18, said bolts passing through upturned or flanged ends 19 of the sectional holder. This construction is best shown in Fig. i and permits of the bricks being readily adjusted for any shrinkage by the action of fire, although in some instances, the holders can be dispensed with and the roof simply formed of arches of bricks or non-fusible material. The arch units gradually inclined from the rear end of the furnace to the fine at the forward end, whereby the combustion chamber formed in the rear end of the furnace will have a large area for the proper combustion of oil fuel or gas admitted thereto through the medium of connections 20 carried by the walls 6 and. 1 (see Fig. 2).

The inner concave side of the wall 9 has a lining holder 21 for the arcuated lining 22, which cooperates with the lining of the wall 5 and the extensions 8 in providing a vertical fine 23 directly above the slots 3 and 12 of the base of the furnace.

The end wall 5 has an opening 2%, which permits of tools or other articles being placed in the forward end of the combustion chamber. The tool receiving opening being in proximity to the flue permits of the outer ends of tools being maintained in a cool state by a blast in the flue, and an air blast is maintained by locating a nozzle below and in communication with the slot 3 in the base plate 1. The nozzle is clearly shown in Fig. 5 and comprises a hollow body having an air inlet connection 26. The top of the body is provided with apertures or openings 27 whereby air can be discharged throughout the length of the slot 12, the air blast deflecting or directing the heat into the flue 23 whereby the operator of the furna'ce is protected from the intense heat thereof. The nozzle 25 can be suitably secured to the base plate 1 and supplied with air from a suitable source.

To support the furnace and providesufficient clearance for the nozzle 25 beneath the same, the base plate 1 is provided with hollow detachable legs or supports 29 and in constructing the furnace with a View to portability, the legs 29 and the nozzle 25 can be removed and placed in the furnace when the same is carried.

To control the exhaust from the flue 23, produce a back pressure in the furnace, and insure a thorough combustion before the escape of heat units, I provide the upper end of the flue with a door or damper 27. The door 27 has pintles 28 pivotally supported by straps 30' secured to the end Wall 5 at the vertical edges thereof. Attached to the edge of the door 27 is a chain or cable 81 that passes over a revoluble sheave or roller 32, carried by the upper edge of the end wall 5. The chain or cable 31 is attached to a pivoted arm 33 supported by the end wall 5, said arm having an adjustable weight 34 which counter-balances the door 27 and maintains the same in an adjusted position to regulate the draft of the flue 23. In some instances, the door or damper 27 can be dispensed with or its mechanical equivalent employed for controlling the draft in the flue 23 other than at the top of the same.

From the foregoing it will be observed that I have devised a self-contained furnace having flues in proximity to the tool receiving opening of the furnace. The fiues obviate the necessity of using an exhaust hood, baffle plates, shields or like devices for protecting the operator of the furnace from the intense heat ordinarily admitted at the tool receiving opening.

In my portable furnace the heat is deflected or directed from the tool receiving opening, and by the tapering shape of the combustion chamber a thorough co-mingling of the products of combustion is insured and consequently an intensity of heat that can be used for various purposes. The manner of assembling arcuated roof units permits of easy access to the interior of the forging furnaces in order to renew the portions of the linings when necessary or make other repairs.

While in the drawing there is illustrated a preferred embodiment of my invention, it is to be understood that the structural elements are susceptible to such changes, as in the size, proportion and manner of assemblage, as fall within the scope of the appended claims.

What I claim is 1. A furnace of the type described comprising a lined shell having vertically alining flues at one end thereof, a nozzle supported by said shell and adapted to produce an updraft in said flues, and means at the upper end of one of said flues adapted to control the draft therethrough.

2. A furnace of the type described comprising a shell having vertically alining flues at an end thereof, said shell having a front wall provided with an opening adjacent to one of said flues, a damper at the upper end of the other flue of said shell, and means upon the front wall of said shell to facilitate adjusting said damper.

A furnace ofthe type described comprising a shell having a front wall provided with an opening, said shell having vertically alining flues with. one of said flues in proX- imity to the opening of the front Wall of said shell, a nozzle carried by said shelland communicating with the flue in proximity to the opening of the front wall of said shell, and an adjustable damper supported by the front wall of said shell and at the upper end of one of said flues.

In testimony whereof I ailix my signature in presence of two witnesses.

l/VILLIAM F. W'EATHERS. Witnesses: Y

Vanna W. BADGLEY, ELMA M. FORSYTHE.

Copies of this patent may be obtained for five cents each, by addressing the Goinmissioner of Batents,

Washington, 30. 0. 

